I have found another thread that told me how to get out of odin mode, which is a relief, but I am back to where I started - I can't do a factory reset, or power off, as these all require me to sign in to authorise
Hello, I am very un-techy, and learning how to use this forum! I couldn't get it on to safe mode. It now has the blue ODIN download page showing, with a 'do not turn off target' message.